Paraffin-coating machine



F. P. VAVRA. PARAFFIN COATING MACHINE. APPLICATION FILED OCT-16,1918.

Patented July fi mm.

4- SHEETS-SHEET l.

F P VAVRA.

PARAFFIN COATING MACHINE.

- APPLICATION FILED OCT- 16 1918- I 1,345,.720. Patented July l2 4 SHEETS-SHEET 2.

F. P. VAVRA. PARAFFIN COATING MACHINE.

APPLICATION FI LED OCT. 16. I918.

Patented July fi, 192W 4 SHEETS-SHEET 3.

F, P. 'v-m/M.

PARAFFIN COATING MACHINE.

APPLICATION FILED OCT-16,1918.

4 SHEETS-SHEET 4.

Patented July 12% QK mN M N nk I VII ltd lit

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FRANK l1. vavna, WE EXCEEU, lILL'lhl'UlS.

PhltllitFIN-CUATIWG MACHINE.

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specification of Letters Patent.

Patented July it, ldttlt Application filed tlctober 18, rate. aerial lilo. $258,399.

To all whom it may 001 were Be it known that L'FRANK P. VA RA, a citizen of the United States, and resident of Cicero, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Paraffin-Coating ll lachines, of which the following is a full, clear, and exact specification.

My invention is concerned with parallin coating machines of the general class shown in the Vavra Patent 1,198,976, and is designed to produce such a machine as will have a very short path for the canton or other blank through the bath of melted: paraffin so that 'while the blank is thoroughly coated, the parafiin will not have time to penetrate the bod of the blank during its passage through t e bath.

To this end it consists primarily in a tank for the melted paraflin with a main gaging roll slightly immersed in the bath and cooperating with two smallerrolls entirely or substantially immersed in the bath, the first of the smaller rolls acting primarily as a feed roll, while the second one has the main function of acting as a final gaging roll and determining the thickness of the coating of paraffin upon the blank as it emerges from between the main roll and the said second smaller roll.

Associated with the gaging rolls, 1 may employ a special pair of feeding rolls as sociated with the proper guide fingers designed to carry the coated blanks up over the edge of the paraffin tank and down into the receiving angle of the blank conveying cords located in the adjacent end, of the cooling water tank.

lt is'further concerned with a novel arrangement of blank carrying mechanism so that the blank will be fed squarely into the receiving angle of the final pair of rolls from which the blanks emerge from the ma- 3 is a top plan view; Fig. 4C is a side elevation of the complete machine, but on a much smaller scale and with the cooling water tank shown in longitudinal section;

Fig. 5 is an end elevation of a portion of the end of the machine containing the coolin water tank; and

ig. 6 is a side elevation at one of the pair of bars used to space the cords in the cooling water tank.

As best seen in Fig. l, ll employ a pair of side frames 10, which are connected at their ends by the crossbars 11 to form a rigid rectangular frame. in this frame, in any suitable manner I support a pair of tanks, the tank 12 at the receiving end, being adapted to contain melted paraflin, while the larger tank 13 is adapted to contain cold water for hardening the paraffin on the blanks as they are discharged thereinto after being coated by the apparatus associated with the tank 12.

Power will be applied to the machine in any suitable manner as by belt to the belt wheel l t seen in Fig. l secured on the end of the drive shaft 15, which is journaled in suitable bearingsv 16 secured on the side frames 10. The shaft 15 has secured thereon the miter gear 17 meshing with the miter gear 18 secured on the adjacent end of the shaft 19, shown in Figs. 4c and 5, which is journaled in the bearing 20 supported from the bracket 21 at one end and at the other end in the bearing 21 supported from the side frame 10 at that end of the machine.

The paraffin tank 12, as best seen in Fig. 2, is in the form of a jacketed tank open at the top and provided with a steam pipe 22 by which steam may be applied to the jacket to keep the paraflin therein at the proper temperature. An overflow pipe 23 extending through the bottom of the tank serves to keep the paraffin at the-desired level. Within the paraflin tank and adjacent the ends thereof are a pair of bearing side frames 24: and 25, which are symmetrical, and are supported on the driving shaft 15 which passes through suitable apertures therein, and which are also supported by the set-screws 26 threaded through projections 27 on the outside of the bearing side frames and en gaging the tops of the side frames 10, as

till

"Till till clearly shown in Fig. 1. These bearing side frames are secured together and spaced apart by the flat bar 28 at one end, said bar being screwed thereto, as seen in Fig. 3, and by the angle bar 29, likewise secured at its ends to said bearing side frames and serving as a guide, as will be subsequently described. The side frames are also connected by another guide bar 30.

The blanks to be coated may be conveniently supported on a holder 31, secured on the extensions 32 of the bearing side frame castings 24 and 25. Journaled adjacent the end of the support 31 is a feed roller 33 preferably having its periphery with annular corrugations therein and secured upon the shaft 34 journaled in the frames 24 and 25. Above the feed roller 33 is a plurality of feed disks 35 secured on the shaft 36, likewise journaled in the frames 24 and 25. The drive shaft 15 has secured thereon just within the bearing side frame 24 a spurgear wheel 38 secured on the shaft 36 and in turn meshing with another spur-gear wheel 39 secured on the shaft 34, so that the feed rolls 33 and 35 are driven by the shaft 15.

J ournaled in the carrying side frames 24 and 25 is a shaft 40 upon which is secured the main or large gaging roll 41, which is preferably a hollow metallic roll having a covering of felt or some similar fibrous material and driven by reason of the spur-gear wheel 42 secured on the shaft 40 and meshing with the spur-gear wheel 37. Likewise journaled in the side bearing frames 24 and 25 is a shaft 43 having secured thereon the feed roll 44, preferably constructed like the gaging roll 41 and having its felt covered surface engaging the similar surface of the roller 41 so that cartons will be gripped between the two rollers and fed between them, they being rotated at the same peripheral velocity by reason of the spur-gear wheel 45 secured on the shaft 43 meshing with the spur-gear wheel 42. The blanks to be coated are fed down into the parafiin and between the rolls 41. and 44 by the action of the feed rolls 33 and 35, the blanks being guided over the inclined surface of the angular bar 29 and beneath the wire guides 46 hooked around the shaft 36 and having the curved ends coiiperating with the rod 47 connecting the bearing side frames 24 and 25.

The bearing side frames 24 and 25 have formed therein a pair of slots 48 of the proper width to accommodate the vertical movement therein of the shaft 49 which has secured thereon the smaller gaging roll 50 which is of the same construction as the larger gaging roll 41. The shaft 49 is journaled in a pair of eye bearings 51 formed on the lower end of the rods 52 which ex tend upward through elongated passages drain off the water of condensation.

formed in the lugs 53 projecting outward from the bearing side frames 24 and 25. Nuts 54 are threaded on the upper ends of the rods 52 and helically coiled expanding springs 55 surrounding the rods between the nuts 54 and the top of the lugs 53 serve to pull the gaging roll 50 against the gaging roll 41 by a pressure that is regulated by adjusting the nuts 54. The gaging roll 50 is substantially immersed in the paraffin, and is rotated at the same peripheral velocity as the companion roll 41 by reason of the spur-gear wheel 56 secured on the shaft 49 meshing with the spur-gear wheel 42. The speed of rotation of these gaging rolls is sufficient so that the paraffin cannot flow down into the diverging angle between said rollers when they are running, and as a consequence the thickness of the coat of paraflin is determined by the covering of the rolls 41 and 50 and the pressure between them.

The coated blanks thus emerging from between the gaging rolls 41 and 50 are preferably directed to a pair of feed rolls 57 and 58 by a plurality of guide wires 59 hooked over the rod 60 extending between the side frames 10 and the rod 61 secured in the bearing side frames 24 and 25, and cooperating with the guide members 62 sprung on the bar 28. These guide members are preferably formed of sheet metal having a pair of apertures 63 cut therein to accommodate the bar 28 and bent into the generally U-shape in vertical cross-section, the guiding edges 64 being curved, as shown in Fig. 2, to direct the'blank from the gaging rolls 41 and 50 to the feeding rolls 57 and 43. These guide members 62 are held in any desired adjustment by the leaf springs 65 interposed between the adjacent ends of the slots 63 and the bar 28, they being secured from movement by the screws 66 threaded through the tongue 67 and engaging the adjacent surface of the bar 28.

The feed rolls 57 and 58 are preferably formed by hollow metal and have a coating of felt so as not to mar the coated surface of thecartons. As it is desirable to keep the paraflin on the blanks warm and semiliquid until the blanks are plunged into the cooling water, I make these r'olls 57 and 53 hollow and open into one end thereof the steam pipes 68 and 69 which serve to supply steam to the interior of the rolls and to The rolls 57 and 58 are journaled in suitable bearings in the bearing side frames 24 and 25 and are provided with spur-gear wheels 70 and 71 meshing with each other and driven by the spur-gear wheel 72 journaled on a stud 73 projecting from the side frame 24 and meshing with the spur-gear wheel 56. All the various spur-gear wheels in the trains have substantially the same pi ch djameter naaarao chine at the proper uniform speed.

liteferring now more especially to Figs. and l, a tanlrlii has mounted therein a pair of rolls '(3 and it journaled in a pair of braclrets 95 supported from the side frames 19.. There are three other rolls 79, it and '29 located in the position shown and iournaled in the braclrets 79, 99 and 9t similarly secured from the side frames 19 and ,errtending down into the water in the tank l9, lit the/discharge end-of the tanlr l3 pair of bearing braclrets 99 and 99 se cured upon the side frames l9 and having journaled therein a pair of feed rollers 95 and 99 geared together at one end by the spur-gears. 9i" and 99 lln idle feed roller 99 is also journaled in the frames 99 and 99., The shaft of the roller 99 has on its other end the spur-gear pinion 99 meshing with an intermediate pinion 9i journaled on a stud shaft projecting from the hearing frame 99 and meshing with a spur-gear wheel 99 secured. on the end of the shaft for the roller 99, which roller together with the companion roll 9d, is iournaled in suit able hearings in the frame pieces 99 and 99' so that their meeting surfaces, which are preferably coated with rubber, may be pressed into contact by the set-screws 95. The shaft 19 has secured on its adjacent end the miter gear 99 which meshes with miter gear 9f secured on the shaft of the roll 93, so that as the machine is operated, the roll-. ers 95 and 99, 99 and 99 and 9d will be rotated at the same peripheral velocity ltunning over the rolls l9, "(7, 99, 99, f9 and 79 are a set of strings or hands 99 and entending over the rolls 95, 79, i9 and "it are a similar set of strings or hands 99, which two sets of strings 99 and 99 are parallel and close to each other on their adjacent runs so that blanlrs fed into the re ceiving anglehetween the rolls l9 and t5.

will he carried down through the carrying way and up over the roll 99 which dis charges them substantially horizontally between the rolls 95 and 99, which in turn deliverthem to the drying rolls 99 and 99 which squeeze off the moisture adhering to the paraffin on the hlanlrs, 'llo lreep the strings 99 and 99 properly spaced apart ll employ a pair of rods 1919 and l9l eatend ing across the tanlr and supported by the hraclrets i995 vsecured to the side frames 19.. these rods 199 and l9l have a series of pins I999 projecting upwardly therefrom and serving toguide the strings 99 and99 which, will be spaced apart to such an erztent as is desirable for the particular width of length being coated "the roll 9t is also provided with a spur gear wheel 19d, meshing with the spurgear wheel 92 so as to cause the rolls 93 and 9d to rotate in unison.

The operation of the complete apparatus will be readily apparent to those skilled in the art, and it "will be seen that the blanks entering the machine between the feed rolls 33 and 35 will he guided down into the melted paraiiin between the rolls ll and ll, and thence pass over the "top of the guide member 99 between the rolls t1 and 59, which latter rolls gagethe amount of paraflin applied and allowed to remain on the surfaces of the cartons or hlanlrs. Emerging from between the rollstl and 59 the blanlrs are forced up against the curved guide surfaces 99 of the guide member 99 and between the feed rolls 5i and 59, which lreep the parafhned surfaces of the blanlr heated and soft until the blanlrs are plunged into the cold water in the tanlr 19 through which. the blanlrs are passed in the customary manner and are finally discharged from the rolls 99 and 94h While l have shown and described my invention as embodied in the form which it at present consider best adapted to carry out purposes, it will he understood that it is capable of modifications and that ll do not desire to be limited in the interpretation. of the following claims except as may be necessitated by the state of the prior art ll hat l claim as new and desire to secure by Letters Patent of the United iitates is l. in an apparatus of the class described,

the combination with a tanlr, of a gaging roll journaled thereover and dipping into the bath, a feed roll located in the tank-beneath the front side of the gaging roll and beoperating therewith, a second gaging roll located in the tanlr beneath the rear side of the main gaging roll and spring pressed into engagement therewith, and gearing for said rollsto drire them with the same peripheral velocity.

9. in an apparatus of the class described, the combination with a tanlr, of a gaging roll journaled thereover and dipping into the bath,'a feed roll located in the tanlz he neath thefront side'of the gaging roll and coiperating therewith, a second gaging roll located in thetanh beneath the rear side of the main gaging roll and spring pressed into engagement therewith, a pair of feed rolls located over the edge of the tanlr, guides to dirept the blanlrs from the pair of gaging rolls to the feed rolls,and gearing for said. rolls to drive them with the same peripheral velocity. A I

'9. in an apparatus of the class described, the combination with a tanlr, of a gaging roll journaled thereover and dipping into the bath, a feed roll located in the tanlr beneath the front side of the gaging roll and coiiperating therewith, second gaging llll' llllli 'liill rolls, and gearing for said rolls to drive them with the same peripheral velocity.

4. In an apparatus of the class described, the combination with a main frame, of a paraffin tank supported therein, a driving shaft journaled in said main frame, a sup porting bar parallel to the driving shaft, a pair of bearing side frames to the top of which the supporting bar is secured near the ends of the paraffin tank and supported by the driving shaft and the main frame, a plurality of feeding and gaging rolls journaled in the bearing side frames and extending into the paraffin tank, and gearing connecting said rolls and the driving i i 5. In a device of the class described, the combination with a paraffin tank, of a pair of feed rolls journaled above the level of the paraffin but discharging downwardly thereinto, a large gaging roll dipping into the paraffin, a feed and gaging roll cooperating with the large gaging roll to grip blanks coming from the pair of feed rolls, a smaller gaging roll cooperating with the large roll, and gearing to drive the rolls at the same peripheral velocity.

6. In a device of the class described, the combination with a paraffin tank. of a pair of feed rolls journaled above the level of the paraffin but discharging downwardly thereinto, a large gaging roll dipping into the pa 'affin, a feed and gaging roll cooperating with the large gaging roll to grip blanks coming from the pair of feed rolls, a smaller gaging roll cooperating with the large roll, a guide member adjacent the large gaging roll between the feed engaging roll and the smaller gaging roll, and gearing to drive the rolls at the same peripheral velocity.

7, in a device of the class described, the combination with gaging rolls adapted to supply paraffin to the blanks, of a cold. Water tank, a pair of soft surfaced, internally heated feed rolls located between the gaging rolls and the cold water tank, adapted to deliver the coated engaged blanks, while still hot from the gaging rolls into the cold water tank, and gearing to rotate the rolls at the same peripheral ve locity.

S. In an apparatus of the class described, the combination with a plurality of fecding and gaging rolls and means for supply ing the latter with melted paraliin, of guiding mechanism associated therewith consisting of a bar, with a pluralitv of guide members, U-shaped in cross-section strung along on the bar, springs interposed between the guide members and the bar, and screws threaded through the guide. members and engaging the bar to secure the guide members in any desired position.

9. ln an apparatus of the (mass described, the combination with a bearing frame, of a gaging roller journaled in stationary bearings in said frame, said frame containing a pair of slots for a gagimg; roll shaft extending therethrough, guide apertures in, lugs carried by the frame in alinemeut with the slots. a pair of rods extending through the guide apertures and having eye bcar ings, springs surrounding the rods, and a gaging roller journaled in the eye bearings.

10. In an apparatus of the class described, the combination with a cold water tank, of a pair of feeding rolls journaled at the rear of and above said tank, plural rollers journaled inthe tank below the water level, strings running over said rollers to feed blanks through the water, and a feeding roll over which the strings run liournaled in advance of and at the level of the lower one of the lust mentioned pair of feed rolls.

ln witness whereof I have hereunto set my hand and affixed my so, this filth day of cptember, i. 191.8.

H." Ull 

